I love Firefox, partly because it’s not Internet Explorer but mostly because of free add-ons like this! (and of course the awesome new address bar feature. and tabs.)
You know when you go on YouTube and the comments section of a video page is overrun with 12-year olds practicing their hate speech and typing skillz? Well I hate that, so that I don’t even look at comments any more. This Firefox add-on removes all the immature ranting, loads of exclamation marks!!!!!!!!!!!! and misspellings so that you only see the comments from people that matter.